Having already learned Latin from the French priests, in 1845 (then about forty years of age), he invited Rev. Jesse Caswell, a missionary of the American Board, to become his tutor in English. To secure the services of Mr. Caswell he offered in return a reward which he perceived would be more prized than any fee of gold he could propose. He offered Mr. Caswell the privilege of using a room in one of the buildings connected with the watt for preaching the Christian religion and distributing tracts, and granted permission to the priests of the watt to attend if they wished. Mr. Caswell accepted the invitation and continued for three years, until his death, to teach English to the chief Priest of Buddhism in his own temple, and to preach Christianity to all who cared to listen. The esteem of the Prince for his tutor is evidenced by the fact that in 1855, when Dr. House was returning to America on furlough, he made the doctor the bearer of a gift of one thousand dollars to Mr. Caswell’s widow in token of appreciation of her husband’s services, and again in 1866, by the same agent, he sent a gift of five hundred dollars. He also caused a monument to be erected, in memory of his tutor, at the grave of Mr. Caswell. The more one contemplates the terms made by Chao Fah Yai with Mr. Caswell the more astonishing it appears. Here is the most influential priest in all Siam, the recognised head of the Buddhistic cult in Indo-China, inviting into his watt an uncompromising teacher of the Christian religion notwithstanding the known antipathy of the king to the westerners and their religion, and in return for instruction in the English language he grants him freedom to teach the moral and religious doctrines of Christianity within the precincts of consecrated ground and permits novitiates and priests under his authority to listen to that doctrine. This broadmindedness of Chao Fah Yai is further shown by an incident which he related to one of the Protestant missionaries. Sometime previous to the engagement of Mr. Caswell a young priest of the watt became a Roman Catholic. The prince was urged to flog the young man for abandoning the religion of his country. To this suggestion the prince said he replied: “The individual has committed no crime; it is proper for every one to be left at liberty to choose his own religion.” On a later occasion the Governor of Petchaburi, having forbidden the distribution of books by the Roman Catholic priests in his province because he said they sought to shield their converts from the authorities when accused of crime, conferred with Chao Fah Yai as to whether he should place the same ban on the books of the Protestants; but the Priest-Prince was able to explain to him the difference of policy between the Roman Catholics and the Protestants and to dissuade him from forbidding the distribution of Protestant literature.